Differential feed mechanism for spinning or combing machines.



P. HELMBOLD & J.WEINBRENNER.

DIFFERENTIAL FEED MECHANISM FOR SPINNING 0R COMBING MACHINES.

APPLICATION FILED IAN-20. I9I3.

LIQQAW. Patented July 11, 1916.

Fi g1 n b e C) a L I J f III Witnesses. 1 p llpivelntgrls. OIU e m o dUuIius Weinbrepner lww 029. M y/Qm A'Itgfs.

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PAUL HELD/30141), GF CQLLIAR, AND JULIUS "WEINBRENNER, OF THANN,GERMANY.

wearer.

Specification of Letters Patent.

Patented July lit, t ilfi.

Application filed January 20, 1913. Serial No. 743,023.

To all whom it may concern:

Be it known that we, PAUL HELMBOLD, a subject of the Emperor of Germany,residing at Colmar, Alsace, Germany, and Jumns NEINBRENNER, a subject ofthe Emperor of Germany, resident at Thann, Alsace, Germany, haveinvented new and useful Improvements in Differential Feed Mechanism. forSpinning or Combing Machines, of which the following is a specification.

his invention has reference to improvements in differential gear forproducing periodic variations of speed of the feed rollers ordrawing-off rollers in spinning or combing machines.

The characteristic feature of our invention is the combination with aspinning or combing machine of a differential gear for driving the feedrollers or drawingoff rollers, in which gear the motion of thedifferential wheel is the resultant of the motion of a wheel which isrotated forward continuously from the main shaft of the machine, and ofan oscillatory motion which is imparted by a crank mechanism.

The feeding of fibrous material in spin ning machines with periodicincrease and reduction of speed for various purposes is already known.This is effected for example by inter-posing between a shaft which has areciprocating motion and the actual feed mechanism a sweeping out devicewhich is alternately put into and out of action. A portion of therearward movement is thereby afiected in such a manner that it isshortened as compared with the forward movement. This feedingarrangement is in general use in combing machines. As a further knownexample of variations of the feed at regular intervals, may be mentionedthe driving of the rear fluted rollers of a ring spinning machinethrough toothed cam disks in the manufacture of yarn which is thickenedat certain parts. Both of these methods of feeding have serious defects.When the first method of driving is adopted, shocks and vibrations areunavoidable while an objection to the latter is its slight adaptabilityto the various requirements in ring spinning operations.

The present invention obviates these defects. lts adoption insuresperfectly quiet running without shocks, with the most favorable speedcurves. The difierential gear which forms the subject-matter of theinvention meets all requirements as regards frequency of the speedvariations and maximum speed and it can be adjusted very readily.

In accordance with our invention a differential mechanism of peculiarconstruction is interposed between a driving shaft and the actual feedmechanism, the chief characteristic of the said differential mechanismconsisting in that the driven toothed wheel of the differentialmechanism is subjected to the simultaneous action of two toothed drivingsystems, one of which is regularly and continuously rotated while theother has a reciprocating motion imparted to it. From the compoundaction of these two driving mechanisms there results a regular periodicsuccession of variations of speed in the motion of the driven wheel andof the feed mechanism controlled thereby, without any shock.

One constructional form of the invention is illustrated by way ofexample in the accompanying drawing, in which Figure l is a diagrammaticlongitudinal section of the mechanism, and Figs. 2 and 3 arecorresponding motion diagrams.

A driving system which rotates regularly and continuously and consistsof a shaft a, a spur wheel Z keyed on the shaft and a spur wheel 0likewise keyed on the said shaft is mounted in any suitable manner onthe frame of the machine. The wheel 6 receives its rotary motion fromthe source of power by means of suitable intermediate wheels. The motionis transmitted from c to a wheel a, mounted concentrically with 0 andprovided with inwardly projecting teeth cl, by means of planet wheels f.Another driving system serves for producing a reciprocating swingingmotion which is likewise transmitted to the wheel 6. In theconstructional form illustrated this driving system consists of variousmembers combined as follows:A shaft h which is rotated regularly fromthe source of power in any suitable manner, for example through theintermediary of the spur wheel g keyed thereon, rotates constantly in asuitable bearing arranged on the frame of the machine. On the said shafta disk 71 is keyed which carries a crank pin is, on which the head Z ofa crank rod Z is mounted. @n the shaft a a disk or provided with a guidesleeve and carrying a crank pin m is mounted concentrically. The other"movement of the wheel e.

head Z of the crank rod Z is mounted on the pin m. The disk 1?, whichhas a reciprocating swinging motion imparted to it carries one or morepins 0 which serve as bearmgs 'for the toothed planet wheels f. Inaddition to acting as already indicated these planet 7 -wheel s servefor transmitting the oscillating movement of the disk 72 to the internalteeth d of the wheel 6.

The simultaneous action of the two drivmg mechanisms described upon thedriven wheel 6, the individual graphic curves of which mechanisms unitein one combined kinematic curve, is seen from the diagrams given inFigs. 2 and 3. The curve in Fig.

2 represents the result when the oscillating stroke of the disk n islong, so that the swinging movement of the said disk during the rearwardmovement produces a retardation of the Wheel 6 beyond the zero point,

6. produces movement in the negative direction. The wheel 6 is thereforelikewise subjectedto an oscillating movement but in 'such a manner thatthe travel in one direction appears greater than the stroke in theopposite direction.

The curve inrFig. 3 represents the result of a short oscillating strokeof the disk n, 'so that the swinging movement of the said disk duringthe rearward movement only produces a slight retardation of the plus-The wheel 6 is not subjected to; any oscillatingmovement but only to aplus-movement with periodic increase or decrease ofspeed. Theoscillating motion represented by the curves in 'Figs. 2 and 3 meets'allthe requirements in feed-ing the fibrous material in a combing machinein an ideal manner, as the outer teeth 29 of the wheel 6 are utilizedfor driving the stripping cylinder. The motion represented by the curvein Fig. 3 is suited for further by shortening or lengthening the strokeof the crank pin is.

What we claim as our invention and desire to secure by Letters Patent isIn a combing machine, the combination with a frame, of a driven wheelhaving a hub journaled in the frame and provided with internal andexternal gear teeth, a driving shaft having one end journaled in theframe and the other end journaled in the hub of said driven wheel, agear on said shaft by which it is rotated, a sunwheel fixed on theshaft, a disk loosely mounted on said shaft, planet wheels which aremounted on pins carried by said disk 'and are in gear with the sun-wheelon the one hand and with the internal teeth of the driven wheel on theother hand, a crank device connected to said disk for impartingoscillatory motion thereto, and means independent from said shaft fordisk.

In testimony whereof; we have signed our names to this specification inthe presrotating said *ence of two subscribing Witnesses.

PAUL HELMBOLD. JULIUS WEINBR-ENNER. lVitnesses:

G120. Girronn, I ARNOLD Zmsnn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

